The main idea of this passage is_____.
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1 .What was scientists' understanding of methane?
A It was produced from plants. B It was not a greenhouse gas. C It was produced in oxygen-free environments. D It traps more heat than any other greenhouse gas.
2 .To test whether plants are a source of methane, the scientists created_____.
A a oxygen-free environment B an environment with the same concentration of oxygen as the Earth has C a carbon dioxide-free environment D an environment filled with the greenhouse gas
3 .Which statement is true of the methane emissions of plants in the experiment?
A The lower the temperature, the higher the amount of methane emissions. B Living plants release less methane than dried plants at the same temperature. C When exposed to sunlight, plants stop releasing methane. D The higher the temperature, the greater the amount of methane emissions.
4 .Which of the following about methane is not mentioned in the passage?
A Plants growing in soil release methane. B Plants growing in water release methane. C Soil microbes consume methane. D Microbes in plants produce methane.
5 .What is the beneficial point of some microbes consuming plant-produced methane?
A Methane becomes less poisonous. B methane is turned into a fertilizer. C Less methane reaches the atmosphere. D Air becomes cleaner.
7 .What does the author think of society toward motorists?
A Society smiles on the motorists B Huge car parks are built in the cities and towns C Victims of accidents are nothing D Society condones their rude driving
8 .Why does the author say "his car becomes the extension of his personality?"
A Driving can show his real self B Driving can show the other part of his personality C Driving can bring out his character. D His car embodies his temper.
9 .Which of the followings is not mentioned as a way against traffic accidents?
A Build more highways B Stricter driving tests C Test drivers every three years D Raise age limit and lay down safety specifications
10 .The attitude of the author is_____.
A ironical B critical C appealing D militant
